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CVE-2026-66793— Governance-policy-addon-controller: governance-policy-addon-controller: arbitrary container image override via managedclusteraddon annotation enables rce on spoke

Quick assessment

Affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open Cluster Management Governance Policy Addon Controller是Open Cluster Management组织的一款治理策略插件控制器。 Open Cluster Management Governance Policy Addon Controller存在输入验证错误漏洞，该漏洞源于governance-policy-addon-controller组件中用户可注释namespaced ManagedClusterAddOn资源覆盖governa

CVSS 8.8 · High EPSS 0.57% · P45

Affected Version Matrix 1

VendorProduct Version RangeStatus
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 any affected
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I. Basic Information for CVE-2026-66793

Vulnerability Information
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Vulnerability Title
Governance-policy-addon-controller: governance-policy-addon-controller: arbitrary container image override via managedclusteraddon annotation enables rce on spoke
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in the governance-policy-addon-controller component of Red Hat Advanced Cluster Management for Kubernetes. A user with permissions to annotate the namespaced ManagedClusterAddOn resource can override the governance-policy container image. This allows an attacker to run a controlled image with cluster-admin privileges on the managed cluster, leading to arbitrary code execution and privilege escalation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Open Cluster Management Governance Policy Addon Controller 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open Cluster Management Governance Policy Addon Controller是Open Cluster Management组织的一款治理策略插件控制器。 Open Cluster Management Governance Policy Addon Controller存在输入验证错误漏洞，该漏洞源于governance-policy-addon-controller组件中用户可注释namespaced ManagedClusterAddOn资源覆盖governa
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2

II. Public POCs for CVE-2026-66793

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III. Intelligence Information for CVE-2026-66793

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Vendor Advisories for CVE-2026-66793 (2)

Same Patch Batch · Red Hat · 2026-08-18 · 14 CVEs total

CVE-2026-66780 9.9 CRITICAL Submariner-operator: submariner-operator: flat broker trust model grants every spoke full
CVE-2026-12564 9.6 CRITICAL Automation-controller: automation-controller: kubernetes service account token exfiltratio
CVE-2026-18963 9.1 CRITICAL Keycloak-services: keycloak-services: unauthenticated account takeover via reset-credentia
CVE-2026-75924 8.7 HIGH Managed-serviceaccount: managed-serviceaccount: hub addon-manager clusterrole grants clust
CVE-2026-66783 8.2 HIGH Submariner-operator: submariner-operator: arbitrary image override enables privileged code
CVE-2026-66782 7.8 HIGH Submariner-operator: submariner-operator: broker api bearer token stored cleartext in cr s
CVE-2026-71365 7.7 HIGH Awx: webhook status callback ssrf leaks the git pat
CVE-2026-15571 7.3 HIGH Keycloak-services: keycloak-services: predictable account-linking hash enables account tak
CVE-2026-66781 6.5 MEDIUM Submariner-operator: submariner-operator: ipsec psk stored cleartext in submariner cr spec
CVE-2026-75032 6.3 MEDIUM Bluez: bluez: out-of-bounds read in avrcp parse_media_element and parse_media_folder
CVE-2026-75485 5.5 MEDIUM Must-gather: must-gather: cluster proxy object dumped raw, bypassing inspect redaction of
CVE-2026-73834 5.5 MEDIUM Must-gather: must-gather: embedded secret data in acm wrapper crs collected without redact
CVE-2026-19608 5.3 MEDIUM Keycloak-services: keycloak-services: name-only group claims let same-name groups satisfy

IV. Related Vulnerabilities

Same product: Red Hat Advanced Cluster Management for Kubernetes 2
Same vendor: Red Hat
Same weakness: CWE-20

V. Comments for CVE-2026-66793

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